A panel of experts to review the gap between number of planning permissions being granted and those built in areas of high demand has been appointed. Phase 1 of the review – currently underway – will seek to identify the main causes of the gap by reviewing large housing sites where planning permission has already been granted. Phase 2 will make recommendations on practical steps to increase the speed of build out, which will be published in the full report. The review will also consider how to avoid interventions which might discourage house building or hinder the regeneration of complex sites.